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CVE-2026-49762— Unbounded integer parsing in the Version module enables CPU and memory exhaustion denial of service

Quick assessment

Affected
elixir-lang elixir
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Elixir是The Elixir programming language开源的一门运行于BEAM虚拟机上的函数式编程语言。 Elixir 1.5.0至1.20.1之前版本存在资源管理错误漏洞，该漏洞源于标准库Version模块中存在不受控制的资源消耗问题，可能导致控制版本字符串的攻击者通过CPU和内存耗尽造成拒绝服务。

CVSS 5.1 · Medium EPSS 0.15% · P4

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking

Affected Version Matrix 2

VendorProduct Version RangeStatus
elixir-lang elixir 0.9.3< 1.20.1 affected
057691722eb8cfe315f5606358954a2b173ff7a3< * affected
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I. Basic Information for CVE-2026-49762

Vulnerability Information
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Vulnerability Title
Unbounded integer parsing in the Version module enables CPU and memory exhaustion denial of service
Source: CVE Program / CVE List V5
Vulnerability Description
Uncontrolled Resource Consumption vulnerability in the Elixir standard library's Version module allows an attacker who controls a version string to cause a denial of service through CPU and memory exhaustion. The version parser converts numeric version components (major, minor, patch and numeric pre-release/build identifiers) to integers without bounding their length. A single large all-digit component therefore forces a super-linear, non-yielding base-10 to arbitrary-precision integer conversion (String.to_integer/1, i.e. :erlang.binary_to_integer/1) that pins a BEAM scheduler, and a larger component raises an uncaught SystemLimitError that crashes the calling process. A single moderately sized string (around one megabyte) is enough; no authentication is required. This is reachable from the public entry points Version.parse/1, Version.parse!/1, Version.match?/3, Version.compare/2, and Version.parse_requirement/1, which applications routinely call on untrusted input such as HTTP parameters, dependency-manifest fields, and package metadata. This vulnerability is associated with program files lib/version.ex and program routines 'Elixir.Version.Parser':parse_digits/2. This issue affects elixir: from 0.9.3 before 1.20.1.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
未加控制的资源消耗(资源穷尽)
Source: CVE Program / CVE List V5
Vulnerability Title
Elixir 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Elixir是The Elixir programming language开源的一门运行于BEAM虚拟机上的函数式编程语言。 Elixir 1.5.0至1.20.1之前版本存在资源管理错误漏洞，该漏洞源于标准库Version模块中存在不受控制的资源消耗问题，可能导致控制版本字符串的攻击者通过CPU和内存耗尽造成拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
elixir-lang elixir 0.9.3 ~ 1.20.1 cpe:2.3:a:elixir-lang:elixir:*:*:*:*:*:*:*:*
elixir-lang elixir 057691722eb8cfe315f5606358954a2b173ff7a3 ~ * cpe:2.3:a:elixir-lang:elixir:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-49762

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III. Intelligence Information for CVE-2026-49762

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Patches & Fixes for CVE-2026-49762 (2)

Vendor Advisories for CVE-2026-49762 (2)

Other References for CVE-2026-49762 (1)

IV. Related Vulnerabilities

Same product: elixir
Same vendor: elixir-lang
Same weakness: CWE-400